Die-casting machine



Feb. 22, 1927. n,e18,223

E. P. PLERCE DIE CASTING MACHINE Filed Julyg, 1920 5 sheets-sheet 1Feb.A v2,2, 1927.

Filed July 26. 1920 y E. P. PIERCE DIE CASTING MACHINE n In l l 5Sheets-Sheet 2 /zz z/ezz for Feb. 192

22 7 E. P. PIERCE DIE CASTING MACHINE A Filed July 26. 1920 5Sheets-Sheet y @gf-'6 ffgcff Feb. 22 1927.

E. P. PIERCE DIE CASTING MACHINEl Filed July 26. 1920 5 SheetsfShef 4CTZ'L.

Feb. 22, 1927. E. P. PIERCE DIE CASTING MACHINE I Filed July 26. 1920 5Sheets-Sheet 5 Patented Feb. 22, 1927'.

i ERNEST P. PIERCE, F CLEVELAND, OHI.

DIE-casrmo MACHINE.

Application led July 26,

and out of operative position with respect to the other. art of thedevice which encloses the cylinder for the molten metal'and plung-4 er;to providefluid actuated means for moving the die carrying frame wherebythe two parts will be locked in operative position; to provide fluidaet-uated'togglelever mechanisrn upon the die carrying frame which willlock the die members in operative position; to provide Huid .actuatedmeans for op- Ierating'the plunger in the cylinderv of the pot; toprovide an arrangementwhich will guard against the operation of theplunger. except when the die carrying frame is in operative position; toprovide a means for bracing the cylinder in position; to provide a meansin thelever; mechanism for the operat1on vof the plunger wherebycorrectionmay be made for maccuracles 1n alignment of the bore of thecylinder and the guide for the plunger operating means; to'provide anangular arrangement of the plunger and that part of the cylinder inwh1ch 1t operates; to provide means whereby the piston will'be `at alltimes covered by the moltenv metal; to provide means for varying theoperative position of the diecarrying frame according to theelevation ofthe nozzle on the cylinder; and to provide an arrangement' of all thepart-s which will be convenient for' `the operat-ion thereof. Myinvention might be embodied in other forms of structure but thepreferred form will be understood from the following description andclaims considered in connection with theaccompanying drawings. y

Fig. 1 is a f ont elevation of my machine with parts bro en away; Fig. 2is a yplan view of my machine; Fig. 3 shows diagram'- matically" the twopositions ofthe die carryframe.; Fig. 4 illustratesl the four-way valvestructure; Fig, 5'is a plan view of a hinge rod used on ,the diecarrying frame for the toggle levers;.Fig.' 6 is a 4front elevation ofthe di'e 'carrying'frame showing the toggle mechanism in open position;Fig. 7 is a similar view showing the toggle mechanism in closedposition; Fig. 8 is a sidel elevation of the die carrying frame showingthe toggle mechanism in4 closed position; Fig. 9 is a plan view ot thetoggle supporting brackets;

.i be understood 192e. serial No. 399,003.

Fig. 10 is a vertical section throughthe pot. and cylinder; Fig. 11 isan end eleva-tion of the means vfor lockingI the plunger operating. Ymeans; Fig. 12 is a plan viewv of lthe bracing -60 means for thecylinder; Fig. 13 is an elevai tion of the same bracing means; Fig. 14is a section on line afa, Fig. 12; and Fig. 15 shnws thecylinderin sideelevation within the pot which is shown in cross section. 455 My devicecomprises, ina general way, av stationary frame member in which ismount'- ed the cylinder for the molten metal, and means for operatingthe' plunger for forcing the molten metal therefrom into the die; and adie carrying frame which is mounted upon the stationary member so as tobe .swungthrough a vertical plane into and out of operative position.Details of structure willfroin the vfollowing descrip- V tion.

The lower stationary part of the device is supported upon the legs' 4,that part indicated at- 1, and inwhich is enclosed the cylinder,comprising an enclosed body, while the other part of this stationarystructure is open frame work. The pot 10 for the molten metal 10 issurrounded by firev brick 7 and is supported by means Vof a flange 11which engages over the flange 9 which extends in- 85 wardly from thefour. Walls of this part of the frame. The upper end of thesupporting'brackets 13 of the cylinder 12 rest upon the lange of theframe and are countersunk in part, as indicated at 14, so that the headsof the screws for securing these brackets in position will not interferewith the die carrying frame when it'ismoved into operative position.Moreover, sullieient clearancev is provided for theV die carryingframe.cylindery is so arranged that the piston `is always covered by themolten metal, 'with the result thatl the danger of metal freezing andjamming the piston is avoided. An opening 15 is provided inthe side wallof the cylin- 109 der so as to allow lthe molten metal to flow into thesame. .The cylinder bore Vis restricted toward the outletr end thereof,as clearly indicated in Fig. 1.' The `cylinder'is of asubstantial-V-shape, as clearly shown in Fig. lo 1', and it is sovconstructed that the two arms thereofwill make an angle of. lessthan90A with each other, preferably from 30 to 60: this angle being' about45. in the present shplwing, and one arm` being arranged vertica v. v YA bushing member-.16 into Vthe cylinder and has its upper surface.curved lvalve is set in one position by vmeans of int-o. an outletnozzle, as indicated at 17. The plunger 18 which reciprocatesin the cyl;

inder bore is operated'by the piston rod 19 which is pivotally connectedat 20 to the lever operating mechanism through the compensating meanswhich will be later de scribed. The means for heating the metal in thepot is indicated in a general way at 2, which might be of any suitablekind, as for instance, a` gas/burner, while the connection 22 providesforl the escape of gases which might be formed in the space 23 betweenthe fire brick and the pot.

The air lcylinder -24 with its supply pipe 25, exhaust 26 and feed pipes27 and 28, together with the valve operating means constitute the meansfor operating the lever mechanism which is connected with the plungerrod of the cylinder for the molten metal. A four-way valve is provided,as illustrated in Fig. 4, whereby when this handle 31, connection may beestablished through they air supply pipe and the pipe 27 leading to theunderside of the piston of thel cylinder, at which time the piston willbe forced upwardl At the same time air connection is esta lished betweenpipe 28 from the top of the cylinder and the exhaust 26, so thatairfwill lbe -forced from the top of the cylinder out through theexhaust, vthus allowing the piston to rise. Then upon turning thel valvein the opposite direction the reverse operation is obtained; that is,air will be forced to the upper side of the plunger and the air belowthe plunger will be forced out through the exhaust. This valve is inneutral position in Fig.' 2 and its operation will be understood fromFig. 4

which shows the ducts 32 and l33. Other valve arrangements might be`employed instead of that here shown. A lever 'arm 34 is pivotallyconnected at 35 to the upper end of the piston rod and is pivotallyconnected at its up er end to the lever arm 36 which is pivota lymounted at 37 upon the bracket 38. The other end of lever 36 ispivotally connectedat 39 to the link member 40 which is pivntallyconnecterLat 20 torrthe compensating means. The mechanism for operatingthe plunger is so arranged .with respect to the-pivot point of lever 36lthatv there is a suiiicient balance of weight orrthe side toward the.cylinder'24, so that its piston will repiain in lowered position withoutair pres- .sure. Thus the air can beshut olf from this cylinder when theplunger 18 is in withdrawn position. Y The bracket 38 is located awayvfrom the. pot so that molten metal will not splash on thebracket andcause. a jamming of the parts.,` vThis bracket is made in-the'form ofaclevis at its upper part, vas clearly indicated in Figs.` 1 and-2, forIconvenience in be suspende mounting the lever arm or walking beam 36.This bracket has an arm 38a to guide the piston rod of the' cylinder 24.This bracket 38 is bolted to the flange at the top of the frame and isprovided with ears 42 and 42' on the two sides thereof, as indicated inFigs. 12 and 14. The upper ends ofthe bracing .rods 43, 43' are securedwithin these ears by means of nuts 44,y 45 and 44'-, 45', the lower partof rods 43, 43;' being provided with lugs 46, 46 which engage in cut outportions 47, 47' in the sides of the cylin4 der. As'will be seen in Fig.12, the lugs- 46,46 have a wedge shape' and the cut out portions haveinclined bottoms, as at 48, 48', so as' to allow the lugs 46, 46 to belowered within these cut-out portions and then raised into `the lockingposition with the broader pcrtionsof thelugs engaging in the recesses49, 49' formed by means of shoulders 50, 50. By first engaging theselugs in the cut-outportions ofthe cylinder and then clamping the nuts44, 45, and 44', 45' against the upper and-lower faces of the ears 42,42', the cylinder can be braced in proper position and will be heldagainst accidental displace# ment during the operation of the machine.

Guide members 51, 51' are secured by means of bolts 52, 52' along theface of the bracket just referred to and extend inwardly over thecut-out portion 53 which is formed in the bracket member and extendparallel with the offset portions 54, 54', as indicated 'in Fig. 14. Inthis way a guide-way is pro- 57 against their respective' seats 58, 59,a

correction can be effected without disturbing the entire operativeconnection between the piston vrod and thel lever mechanism. In

other words, the enlarged hole 19v in" the v slidable member 55allowsthepiston rod to be displaced in any direction across its axis.

The seat members 58, 59 are formedwith concave faces to receive thecorresponding convex faces of the nuts 56, 57 ,.respectively,

may be had upon adjusting the piston rod 19. as just referred\to. l

l The shaft" 60 is mounted upon vadjustable bearing means which will'belater described.

,The lever arm 61' which is fast *upon the shaft 60 is actuated bymeans. of air' pressure in the cylinder 62, which cylinder might v froma suitable point at proper so/ that a more ready seating of the nuts ICI `reverse connections are established.

elevation above the machine by means 'of the swinging connection 63,.which is an old arrangement` in the art. The lower end ot' the pistonrod 64 is connected to the lever 61, while a piston is carried upon theupper end thereof. Cylinder 62 is provided with a four-way valve 117 andits piston is operatedvin the same manner as that of cylinder '24. Bymanipulation of handle 118 connecsupported at a suilicientlv high pointto all:in

10W proper operation of the'piston and the swinging of the cylinder. Thelever arms 66, 66' which are fastened at one end to the shaft havepivotal connection at 67, 67 with'the connecting` links 68, 68. Theseends, as clearly indicated in Fig. 1, and

are pivotally connected at-71 and 7 1v to the bars 69, 69. The bars 69,69 are bolted at 70, 7 0 along the lower part of the die car' ryingframe. The hinge projections 65, inthe die carrying frame have bearingin the castings 65a, 6'5? on the stationary frame. Fig. 1 shows the diecarrying frame'in op# erative position with respect to the rest of thedevice, and it will -be seen from Fig. 1-

that the lever mechanism just referred to is so arranged that it willlock the die carrying frame in closed position. This is made'possible bythe fact that the points of pivotal connection 67, 67 are swung beyondthe line of pivotal connections 60, 60 and 71,

Y 71". In other words, theI link members 68, 68' are swung'slightlybeyonddead center.V The adjustable bearing Imeans for y-the shaft 60comprises plate -members 72,72. which are duplicates in structure andonly one of them will be-descrbed. The plate 72 is pivoted to the sideof the frame at- 78 and is provided with means for being locked inproper position. Enlarged bolt holes are provided in theplate -72 asindicatedat 74 and 75 -so that this' plate member can" be moved eventhough' the bolts 76 'and 77 pass through these openings and through thewall of the frame. When the plateA member 72 has been adjustedi to theproper position: the nuts on the outer end's of bolts 76 and V77 can betightened to hold the nlatein such position. .The rod 78 is pivotallyconnected Y `tothe plate member 72 at the point 79 and` extends throughan ear'formed on the 'sidej ofthemain artof .the frame,:as indicated at80. The ower -end of this rod is screwlthe lower die member. links 68,68 are curved near their other voperated for the purposelof "moltenmetal into the die. f

threaded and is adapted toy receive a nut 81 which can be.tightenedagainst the low" 'er face of the ear 80 and in-this Way clampward'movement. A means for clamping :the plate 72 in proper positionagainst up- 70., *the plate l72'in proper position against downwardmovement comprises a screw bolt 82whose` head supports the lower edgeot' the plate member 72. This screw b olt 82' carries a nut 83 which canbe screwed into locking engagement against `the upper face of the earinto which the screw bolt 82- is adapted to" be threaded. Thus it willbe seen that the screw bolt 82 can be raised or lowered by being screwed`up or down in ear 80 and will thus'raise or lower the plate 72 1ing orlowering the shaft 60 in this manner tne length ofthrow of the levermechanism is varied and adjustmentl is elected between the nozzle 17 onthe cylinder and A latch member-is pivoted at 84 upon a- VF:bracket arm85 which extends from the main 4frame of the machine, and is normallyheld by means-ot spring 86 in such position that it will' lock the arm87 of the valve operating handle 31, the'pin 84a extending from thislatchl member dropping into a hole 87a in arm 87,'as indicated in Fig.11. Thus the spring 86 through the latch member no-rmally holds the'Valvevhandle 31 i-n locked position so that the piston of the cylinder24 cannot be operated when in such-position. The end portion 88 of the'lever arm, 61 is 'dapted to be lowered upon the rear end ot9 the latchmember and to release the same against the tension vo f the spring 86;at which time the valve handle 31 can be forcing the The` lower andlupper'parts of the die are i carried bythe plate members 89and 90, re-`spectively,`whichare- Supported upon' the upri hts 91 formingpart'offthe die carry' ing rame.y The lower'member 89 has xed positionupon the die carrying frame, While llt) the uppermember 90 is adapted tobe moved hack and' forth thereupon. 'The lowery die member isfdetachably mounted-in plate 489 y'and is'provided lwith a mouth at thelower end of its metalreceiving -port to fit the nozzle 17, aswill beobvious to onewho 1s 4familiar. with the .a 'Bushing `menbers 92 aresecured'to the ower face of the upper member 90. Suitable openings lareprovided L in the die to allow escape of air upon Iilling` the die'withmolten l` metal, which is an old 'practice in the art and is thereforev'not illus-`- itrated. 'A fluid cylinder 93 is securedby means ofyboltsupon the upper :face of the die plate 90, and through the operation ofthe valve mechanism which controls the fluid this cylinder and dieplatecan be moved back and forth upon the frame soas to close or open thedie. The piston rod 94 is provided with ears at its upper-end, whichears have pivotal connection at 95, 95 with link members 9S, 9G.` Theselink /members in turn are pivotally connected at 97 and 97 with theshorter arms of the lever members 98, 98, the last named levers beingpivotally mounted upon bearings 99, 99 which will be later referred toin detail. Levers 98,98. are of an open frame structure and are narrowedfrom the upper to the lower end so as to swing between the bearings 99,99. These two levers are duplicates. The other end of the lever 98 ispivotally connected at 100 to the lever arms 101, which last named leverarms are pivotally connected'at 102, to the hinge rod 103 mounted on themain supporting bars 104. The bars 104 are held in fixed positionxbymeans of nuts 105 engagingthe screw threads on the uprights, as shown,-and hinge rods 103 are curved at the middle portions 106, as seen inFig. 5, to accommodatethe -upper end of the cylinder as it moves pastthese rods. These supporting bars are duplicates; and likewise the twohinge rods. The lastnamed bars 104 remain in iixed position during thereciprocatoryv movement of the piston and cylinder, with the result thatwhen fluid is .forced `upon the upper sideof the piston, the levermembers will be moved from the position yshown in Fig. 6 to that shownin Fig. 7. 'The piston under the force of the Huid pressure folds thelever arms in the manner just referred to and will also carryV thecylinder with the upper die plate to the position illustrated in Fig. 7.Thus it will be seen .that the die is closed with a posi tive force'andan effectual lock is obtained by straightening the toggle levermechanism to prevent accidental opening of the die.

Cylinder head 106 is secured by bolts to the cylinder'as shownand uponthe cylinder head there are provided two bracket memA bers havingsemi-circular feet 107, 107 vsecured bysmeansiof bolts as shown.. Thelegs 109,109 are provided at their upper ends withA bearingsi 99, 99 forthe lever arms 98,

98. As clearly shown in Fig. 9, sufficient space lis .allowed betweenthe guide bearings 110, 110 and 99, 99 to accommodate the lever'arms101, 101. As will be seen from the drawings th'e legs 109, 109 extendup- 111, 111 andthe bearings 99, 99.

ferred to are given suiiicient inside curvature to allow free access tothe stuffing` box of the piston. Sufficient spaceis alsoAv providedbetween the legs of the brackets to allow folding of the links 96, 96',as seen in Figs. 6, 7 and 9.

A four-way valve 112 like that described before and illustrated in Fig.4, is employed in connectionwith the operation of cylinder 93, that isto sayywhen the valve 112 is set in one position, air connection isobtained through the supply pipe 113 and fthe pipe 114 which hasconnection witli;` the upper side of the piston. lAt the same time thepipe 115 from the lower face of the piston is connected with the exhaust116. Then upon setting the valve 112 in the other posilion, the supplypipe 113 is connected through pipe 115 with the under side of the pistonand the pipe 114 isA connected with the exhaust. T he upper die plate 90is bored out as indicatedin dotted lines at 90a for passage of air tothe lower end of the cylinder, that is, from pipe 115 to the under sideof the piston. The flexible pipes or tubes 113, 114 and 115 areconnected as shown in Fig. 1 with the metal pipes of the valveandcylinder. be -used at this point instead of that shown.

The parts on the die kcarrying frame, including the cylinder, its pistonland piston Other valve arrangements might rod, are/ofsuflicient-weightto hold the die v in closed position withoutmaintaining the air compression, even though the toggle lelvers are notbrought to Yfully straightened position.

The operation of this device briefly stated co-operative relation withrespect to the nozzle upon the cylinder- This is accomplished by meansof the air cylinder 62. The `-air upon being admitted to the under 'faceof the piston will force rod 64 upwardly and will cause swingingmovement of the lever arm to thef-right,.-the air :above the'pistonbeing exhausted at the same time through the pipe 120. reaches the crestin its rotary motion it `wil move downwardly to the right so as toassume the position shown in Fig. 1. As soony as the -crest isreachedthe operator will manipulate the valve Gso as to gradually admit airthrough pipe tothe upper side of the pistn so as to gradually releasethe air1 from the under side of the piston, thus allowing the diecarrying frame to lower to its normal Then whenl the lever arm` 6position against the air compression on the i under sideof the'pston'.This will prevent any sudden jarring of the die carrying frame as itmoves into -position over the pot. The

l i 'can then turn air onto the lower face of the curved portion vof thelink members `(i8, 68v

will then come to rest upon the shaft 60, sufficient lclearance beingprovidedbetween the bearings and the lever connections. When.

piston in cylinder 24 and in this way force the metal from the pot intothe die. Then having filled the die by operation of'the valve, the diecarrying frame will be swung to the left by turning the yvalve to admitair to the under side of the piston and to connect pipe 120-with theexhaust. i As soonas the lever arm 61 reachesits crest in its rotarymovement to the left, thev'operator will gradually reverse the airconnections so -as to release the air from the. under side `of thepiston, and in this way accomplish a gradual lowering of the diecarrying frame to its horizontal position, using the air com- 'pressionunder the piston to prevent any sudden jarring thereof. T lie castingcan then be removed from the die and the same operation repeated.

With my 'arrangement all of the parts are conveniently and compactlylocated with respect to each other and decided advanta esare realized inthe operation 'of the piston or forcing the molten metal into the d ie,'and also in connection with the operation for closing the die members.Among other sadi ticular device will readily suggest themselves.

vantages resulting from my device isthat which resides in theparti/cular arrangement of the cylinder. A s will be seen from Fig. 1,that portion of the cylinder which has the enlarged part of the boremakes an angle of approximately 45 with respect to its other part. Yment the piston operates at an angle substantially "l to the horizontal,and by means of the particular lever connections the airl cylinder foroperating vthe same is conveniently located on one end of the machine.Then, too, by having the piston always covered with the molten metalthere is no danger of such metal freezing ory causing the piston to jamin the cylinder. lThe advan- 'tages resulting from `the lever operatingvmeans which allows the locking ofthe die carrying frame in operativeposition, as well las 'that resulting. from they-means for preventingactuation yof the plunger before the die carrying frame is in operativeposition will be obvious; as also that resultingk from themeansforbringing the die memberstogetlier andsecuring the'in in closedposition.

i The adjustable bearingfor the shaft which isconnected-with the leversfor moving the die carrying frame constitutes another ,ad-v

vantagein connecti011` with the proper seat# As the result of thisarrange-` ing of the die carrying frame upon the nozzle. With thisarrangement it is possible to. properly position the die .carrying framewith respect to different cylinders in which the nozzles termin-ate atdifferent elevations.

-Fiirther .advantages are found in the means for bracing the cylinderagainst accidentalA displacement, and also in the means for compensatingfor any inaccuracies 1u the bore `of the, cylinderor in the alignment oftlie bore and the guide for the lever mechanism.

-which is also movable, .the weight ofthe parts upon the frame is toalarge extent kept low. Furthermore, the arrangement. of

the cylinder. between the movable members just referred to produces amore elcient operation of the parts along the frame. Still another.advantage resides in the fact' that the die can be maintained lin closedposition by theair pressure or the air can be cut-off, the die remainingclosed under the weight of the parts, even though the toggle levers arenot in fully straightened position.

Other advantages resulting from this parto those who are familiar withthe art to which it relates. c c

What I claim is: f. l. In a die casting machine, the combination of aframe, a cylinder in said frame, a plunger mounted on said frame atanangle of substantially' 45 to tlie vertical, means i for operating saidplunger in said. cylinder, and a swingingly 'mounted die 'carrying frameadapted' to be swung into and out of vertical position above thecylinder.'

' 2. In a die castingmachine, the combination of a frame, a cylinderstationary in said frame, a plungerl for4 said cylinder,

means for operating said plunger, a swingingly jmounted die carryingframe andfluid compression means for swinging said .frame Y into and outof vertical `position above the cylinder and for ,producing lopening andclosing movement of the upperdieon said v'diecarrying frame.

y3.'. In a die casting machine, the combina- Y tion of a frame, acylinder in said frame, `a plunger for said cylinder, means foroperating said plunger, a swingingly mounted die carrying frame jadaptedto `be swung into and out of operative position,*lever mechanism for'eecting such swinging movement,

past dead center to lock the die carrying frame in closed position, andmeans for efiectingy such swinging movement of the die carrying frame.

5. In a die casting machine, the combination of a frame, a cylinderinsaid frame, a

'plunger for said cylinder, means for operating said plunger, aswingingly mounted die carrying frame adapted to be swung into 'and `outof operative position, lever arms connected tothe stationary and diecarrying frames and having pivotal connection With each other, saidlever arms being so constructed and arranged that the point of pivotalconnection between said lever arms may pass beyond dead center uponoperation of said lever arms for bringing the die carrying frame tooperative position.

6. In a die casting machine, the combination of a frame, apot supportedin said frame, a cylinder in said pot, and having a bore of angularextent, the discharge portion of said angular bore being substantiallyvertical, a plunger for operation in the borel of said cylinder, andmeans for operating said plunger, the parts being so arranged that theplunger bears an acute angle to the horizontal.

7. In a die casting machine, the combination of .a frame, a potsupportedin said frame, a cylinder in said pot having a plunger bore atanangle to the vertical, a bracket upon said frame, and bracing rodshaving connection with said cylinder and said bracket and extending atan angle corresponding to the angle of the plunger bore.

8. In a die casting machine, the combination ofv a frame, a potsupported in said frame, a cylinder in said pot, a plunger for operationin said cylinder, means for operating said plunger and an adjustableconnection between said operating means and the plunger allowingadjustment thereof.

9. In a die casting machine, the combination rof a frame, a potsupported '1n said 1 frame, a cylinder in said pot, a plungerforoperation in said cylinder, means for operating saidjplunger, saidoperating means ineluding a connection allowing adjustment in a planetransverse to the direction of loperai tion of'said plunger. f

` 10. In a die casting machine, the conibination of a frame, a potsupported in said rif-ame, a cylinder -i'n saidpot, a plunger -forco-operation with said cylindenya bracket upon said frame, means foroperating said plunger including a member having sliding relation withsaid bracket, saidmember having adjustable connection with saidoperating means.

11. In a die casting machine, the combination ot a frame, a cylinder insaid frame, a plunger for said cylinder, means for operatingsaid'plunger, control means for said operating means a die carryingframe adapted to be moved into and out of operativeposition, means forcontrolling the die carrying frame in its movements and means undercontrol of the die carrying frame for locking the control means of saidplunger operating means in inoperative position.

12. In a die casting machine, the combination of a frame, a cylinder insaid frame, a plunger for said cylinder, means for operating saidplunger, a die carrying frame adapted to-be moved into and out ofoperative position, means for locking said optive position, and meansfor moving said die carrying frame into and out of operative position,the plunger operating means being under control of said last named meansand separate control means for the plunger and die carrying frameoperating means.

1.4. In a diecasting machine, the combination of a frame, a cylinder insaid frame, a plunger for said cylinder, a'die carrying frame adapted tobe mbved into and out of operative position; valve-controlled fluidmeans for operating the plunger, and means under control of the diecarrying vframe for locking and releasing said valve control of thefluid operati-ng means for said plunger.

15. In a die casting machine, the combination ol a stationary frame, acylinder in said frame, a swingingly mounted die carrying frame, meansfor swinging said die carrying frame into and out of operative position,said means including an adjustable pivotal bearing, whereby the positionof 'the' die carrying l rame with respect to the cylinder can be varied.A

16. In a die casting machine, the combination of a. Stationary frame, acylinder in said frame, a die carrying frame operatively associated withsaid cylinder, and being provided With relatively movable die`supporting plates, and means for bringing said die supporting platesinto and out of closed relation, said means including double toggle`lever mechanism, said toggle -lever mechaposition the toggle levers areinv collapsed and approximately; straightened position,

thereby providing a lock for said die supporting plates. v

17. In a die casting machine, the combination of a stationary frame, vacylinder in said lframe, a swingingly mounted die carry- V of the same,whereby the position ofthe die car in@r frame' with respect to-theclinder ry .e y

18. In a die casting machine, the combination of a stationary frame,- acylinder in said frame, a swingingly mounted Idie carrying frame, means'for swinging said die carrying frame` into and out of operativeposition, andm'eansvfor Vvaryili the swinging connection between the iecarrying frame and the means for swingingv the same, wherebyl theposition of the die carrying frame with respect to the cylinder can beVaried.

19. In a die casting machine, the combi- A nation of a stationary frame,a cylinder in saidframe, a swingingly mounted die carrying frame, meansfor swinging said die car.- rying frame into and out of operativeposition, said means including a bearing member for said swinging means,saidbearmg member being pivoted to said frameand having mea-ns forsecuring the same in adjusted position.

20..In a die casting machine, the combi` nation of a stationary frame, acylinder in said frame, a swingingly mounted die carrying frame, meansfer swinging said -die carrying frame into and outof operative position,said means m'cluding a bearing member for said Swin 'ng-means, saidbearing memv ber being adjustable upon said frame and means for securingthe same in adjiistedposition. 21. In adie casting machine, thecombination of a vstationary frame, a cylinder in said frame, aswinginglyjnounted die carrying frame, means for swinging said diecarrying frame into and outof, operative position, s aid means includingshearing member for said swinging means,A saidbearing meniber beingadjustable upon. said lframe iii'. a.

vertical plane, `and .means vforlocking said bearing member againstupward and downward movement. f

` 22. In a die casting machine, the combi.

nation of a stationary frame, a cylinder in saidl frame, a swinginglymounted diefcariy1ng.frame,vmeansy for swinging said die carrying frame1nto vand out of operative position, said means including a plurality ofbearing members for said swinging means, said members being adjustablymounted andfmeans for securing the saine in adjusted position.

23. InA a die casting machine, the combi` nation of a stationary frame,aV cylinder 1n' said frame, a swingingly mounted die carrying frame,means lfor swinging said die carrying frame into and out of operativeposition, said means vincluding a lplu- 'ality of independentlyadjustable bearing members for said swinging means.

24. In a die casting machine, the combination-of a stationary frame, acylinder in said frame, a swingingly mounted die carrying frame, meansfor swinging said i die carrying frame into and lout of operativeposition, said means includingV aplurality of bearing members for said`swinging means, said members being capable of independent adjustment andmeans for securing the same in adjusted position.

In a die casting machine, the combination of a fra1ne,`a pot supportedin said frame, a cylinder in said pot, a plunger for operation in saidcylinder, and lever mechanism for operating said plunger, said levermechanism being so constructed and arranged that the weight of the powerend thereof will df itself maintain said plunger in Withdrawn position.

26. In a` die casting machine, the combination of a frame, apotsupported in said frame, a' cylinder in said pot, a plunger foroperation in saidcylinder, Huid actuated lever mechanism for operatingsaid plunger, the weight of said mechanism being so distributedwithrespect to the fulcrumpoint that the power end thereof will bemaintained..in withdrawn position by' gravity alone. i

27. In a die'casting machine, the combination of a frame, a cylinder insaid frame, a plunger for said cylinder, means for operating saidplunger, a swingingly mounted die carryinvr and out 0 operativeposition, lever arms -connected t the stationary `and die carry-- ingframes and having pivotal connectiona plunger for said cylinder, meansfor operating said plunger, a die carrying fra-me adapted' to be movedinto and out of operative position,` and Huid compression meansv foropening and closing the die, said means including a cylinder mounted formovement in a path in substantial alignment with that o f the dies inclosing and opening.

29. In a die casting machine, the combinationof a, stationary frame, acylinder in said frame, a'die carrying-frame operatively associated withsaid cylinder and beame adapted to be swung into' isoA ing provided withrelatively movable die supporting plates, and fluidcompression means forbringing said ydie supporting -plates into and out of closed relation,said means including a cylinder mounted upon theouter faceof one of saiddie plates.

30. In a die casting machi/ne, the co-mbination of a stationary frame, acylinder in said frame, a die carrying frame operatively associated withsaid cylinder and ybeing o provided with relatively movable diesupnation of .a stationary frame, a cylinder in said frame, a diecarrying frame operatively associated with said cylinder and being`provided with relatively movable die supporting plates, and means forbringing said die supporting plates into and out of closed relation,said means including fluid actuated mechanism, said mechanism "having'spaced connections with said die carrying` frame for movementvtherealong, and a fluid cylinder forming a part of saidmechanism vlocated between said spaced connections.

. 32. In a die casting machine, the combination of a stationary frame, acylinder in said frame, a. die carrying frame operatively associatedWith said cylinder and being provided with relatively movable diesupporting plates, and means for bringing said die supporting platesinto and out of closed relation, said means including a mechanism'having spaced connectinns with said die carrying frame `for movementtherealong, and having also a fixed connection with said die carryingframe at.a point between said spaced connections.

33. In a die casting machine, the combination of a stationary frame, acylinder in said frame, a die carrying frame operatively associated withsaid cylinder and being provided with relatively movable die supportingplates, and means for bringing said die 50 supporting plates into andout of closed relation, said means including mechanism so constructedand arranged that said die mem- -bers can be maintained in closedvposition by the weight/of said mechanism alone..

In testimony whereof I aiiix my signa' ERNEST P. PIERCE.

ture.

